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July 2025 General Discussion


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High temperatures yesterday across Southeast Lower Michigan. Reported highs ranged from 92 at Port Hope, Port Austin, Cass City and Linden, to 102F at Grosse Pointe Farms. The latter looks a little high, but I'm not sure of the microclimate there. The next closest (not shown) was 98F at Selfridge ANG Base. That site is on xMacis, but for some reason, the data doesn't get input until the end of the month. In fact, there are records for Mt. Clemens Area extending back to the 1800s.

Weather Bureau sites, plus Uni. of Mich. (5 pm observation time) and White Lake 4 E (midnight to midnight - NWS office site):

NsbJ2zZ.png

Other co-op sites, with morning observation times. Note that these go into the book as the temperatures for 7/25, but the highs occurred yesterday and the reported lows this morning:

7ps4nfX.png

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Widening out the view. A number of daily record high minima were observed yesterday at long term "threaded" sites... just looking her at places with 100-150+ years of record generally. There were certainly many more at cooperative observer sites and locations with shorter PORs. A number of locations saw low temperatures within 1 or 2F of record highs, and for those locations it was generally the 2nd or 3rd highest low for the date.

Records:

Rockford (74, tied)

South Bend (74, tied)

Huntington, WV (75)

Paducah, KY (78)

Meridian, MS (78)

Jackson, MS (78, tied)

nddRmW7.png

Among maximum temperatures, not many records. Syracuse, New York set a new daily record of 94F. Several locations saw their 2nd or 3rd highest max temperature, but still fell well short of the record. We were competing with a 1934 heat episode that brought all-time record heat to some locations.

GOpVZXU.png

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2 hours ago, TheClimateChanger said:

High temperatures yesterday across Southeast Lower Michigan. Reported highs ranged from 92 at Port Hope, Port Austin, Cass City and Linden, to 102F at Grosse Pointe Farms. The latter looks a little high, but I'm not sure of the microclimate there. The next closest (not shown) was 98F at Selfridge ANG Base. That site is on xMacis, but for some reason, the data doesn't get input until the end of the month. In fact, there are records for Mt. Clemens Area extending back to the 1800s.

Weather Bureau sites, plus Uni. of Mich. (5 pm observation time) and White Lake 4 E (midnight to midnight - NWS office site):

NsbJ2zZ.png

Other co-op sites, with morning observation times. Note that these go into the book as the temperatures for 7/25, but the highs occurred yesterday and the reported lows this morning:

7ps4nfX.png

I wonder if that observer in Grosse Pointe is the same one that perpetually lowballs their snowfall totals...:lol:

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58 minutes ago, Powerball said:

I wonder if that observer in Grosse Pointe is the same one that perpetually lowballs their snowfall totals...:lol:

The funny thing is Grosse Pointe snowfall numbers seemed more realistic the past few years many times. They used to be a joke. 

Obviously the 102° is wrong. Grosse Pointe if anything should be cooler due to its proximity to the water. 

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53 minutes ago, michsnowfreak said:

Thought this was interesting. 90° days in the US are 23rd lowest on record to date.

 

Screenshot_20250725_133449_Facebook.jpg

That's a misleading graphic. The distribution of stations has changed over time with more high elevation sites across the country than there were in the past. Moreover, most sites had afternoon/evening observation times before the 1960s-1990s, which results in somewhat of an overcount on metrics like these (e.g., day has high of 95F, at 5 pm, the observation temp is 92F... the next day's high is recorded as 92F, even if it might have only reached 84F).

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Nice clump of MCV convection slowly swirling this way.  Putting down quite a bit of rain along it's swath out over Iowa.

EDIT:  Jinxed it.  It's on the decline now on approach lol

EDIT2:  Had a period of gentle anvil rain.  Picked up 0.14".  Good chance the late night stuff hits us good though with some heavy rainfall potential then.

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8 hours ago, TheClimateChanger said:

Widening out the view. A number of daily record high minima were observed yesterday at long term "threaded" sites... just looking her at places with 100-150+ years of record generally. There were certainly many more at cooperative observer sites and locations with shorter PORs. A number of locations saw low temperatures within 1 or 2F of record highs, and for those locations it was generally the 2nd or 3rd highest low for the date.

Records:

Rockford (74, tied)

South Bend (74, tied)

Huntington, WV (75)

Paducah, KY (78)

Meridian, MS (78)

Jackson, MS (78, tied)

nddRmW7.png

Among maximum temperatures, not many records. Syracuse, New York set a new daily record of 94F. Several locations saw their 2nd or 3rd highest max temperature, but still fell well short of the record. We were competing with a 1934 heat episode that brought all-time record heat to some locations.

GOpVZXU.png

I saved this the other day, #1 hottest 30-day period for New York

DwLOZ04.jpeg

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